<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Script</title>
	<script type="text/javascript">
		document.write("www,asd");
		document.write("<br>");
	</script>
</head>
<script defer="defer" type="text/javascript" src="defer.js"></script>
<script async="async" type="text/javascript" src="async.js"></script>
<body>
	<p>这里是Body里面的内容，看一下什么时候加载...</p>
</body>
</html>